/*清除默认样式*/
*{
 padding: 0;
 margin:0;
 list-style: none;
}

blockquote, body, button, dd, dl, dt, fieldset, form, h1, h2, h3, h4, h5, h6, hr, input, legend, li, ol, p, pre, td, textarea, th, ul {
    margin: 0;
    padding: 0;
}
li{
 list-style: none;
}
a{
 text-decoration: none;
 color: #000000;
}
img{
 /*当块级元素嵌套图片时，清除图片默认3px*/
 vertical-align: top;
}
/*整体缩进：tab  整体前进：tab+shift*/
input{
 /*清空边框*/
 border: none;
 /*清空外边框*/
 outline: none;
}

/*公共类*/
/*版心类*/
.core{
 width: 1180px;
 margin:0 auto;
}

/*清除浮动类*/
.clearfix:after, .clearfix:before {
    content: " ";
    display: table;
}
.clearfix:after {
    height: 0;
    line-height: 0;
    visibility: hidden;
    clear: both;
}